The Balance of Good Health dietary guide is to be given a new look - but the Food Standards Agency has insisted that the advice on which it is based will not change.

The pictorial representation of a balanced diet is popular with nutritionists and dieticians, who use to it to show people how much of each major food group they should eat, without blinding them with percentages.

But FSA bosses say the image, produced in 1993, looks outdated. "We did some testing among consumers and nutritionists and decided we needed to design a visual more appropriate for the 21st century," said a spokeswoman. "But the basic advice will remain the same."